I was unable to get a reliable water profile from where I am
Have you contacted your water company? They have the ion numbers we brewers are most interested in. When talking to them, also ask about their water sources that supply your tap water, and how much change or fluctuation there is in those mineral numbers such as, for example, seasonal changes or changes due to demand.
If there is a large swing it would be difficult to know what's in your water at any time.
In that case, if you brew much, a (small) RO system can provide you with (near) mineral free water, a blank slate to build upon. We have a sponsor here on HBT who may be able to set you up, or tell you what to look for in a small system that's affordable to maintain.
Otherwise, yeah, just buy RO or distilled water as needed. Some stores have RO machines, use a (cheap) TDS meter to tell you how much the mineral content is, an indication of how well the membrane is working.
Although much rarer now, some prepackaged water is (lightly) chlorinated, so that would need a (simple) Campden treatment before used in brewing.